161737073 has 2 divisors, whose sum is σ = 161737074. Its totient is φ = 161737072.

The previous prime is 161737067. The next prime is 161737111. The reversal of 161737073 is 370737161.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161594944 + 142129 = 12712^2 + 377^2 .

It is a cyclic number.

It is not a de Polignac number, because 161737073 - 2¹⁰ = 161736049 is a prime.

It is equal to p_9066392 and since 161737073 and 9066392 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (161737003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80868536 + 80868537.

It is an arithmetic number, because the mean of its divisors is an integer number (80868537).

Almost surely, 2^161737073 is an apocalyptic number.

It is an amenable number.

161737073 is a deficient number, since it is larger than the sum of its proper divisors (1).

161737073 is an equidigital number, since it uses as much as digits as its factorization.

161737073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18522, while the sum is 35.

The square root of 161737073 is about 12717.5891190115. The cubic root of 161737073 is about 544.8410983595.

The spelling of 161737073 in words is "one hundred sixty-one million, seven hundred thirty-seven thousand, seventy-three".